A liquid composition of nonspecific ingredients for application on fabricated canvas articles, such as life preservers and canopies, to increase the durability of the products. It is of brushing consistency, and penetrates the cloth as well as forms a coating which dries to a hard film. It may impart such properties as resistance to fire, water, mildew, and weathering. See also PRESERVATIVE COATING, COTTON MATTING; MILDEW RESISTANT COMPOUND, TEXTILE.